<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/index.css" type="text/css">
</head>
<body>
    <form action="test.php" method="post">
        <input type="text" name="digit">
        <input type="submit" value="提交">
    </form>
</body>
</html>
